Who’s in charge in humans? Our body is made up of only ten percent human cells. The real bosses of our internal control systems are trillions of microbes - bacteria and fungi that have a tremendous impact on our health and can even influence our thinking. British scientist Alanna Collen demonstrates that our modern lifestyle is responsible for civilization diseases such as severe obesity, allergies, autoimmune diseases, and digestive disorders: excessive hygiene measures, poor dietary habits, and antibiotics disrupt the balance of our microbial ecosystem. However, exploring these previously underestimated connections also presents a significant opportunity: a tailored microbe-friendly diet could bring new hope to those with chronic illnesses and improve the well-being of us all.